SAIC, P.O. Box 68, Gunpowder, Maryland 21010, United States.
Langmuir. 2012 Jul 17;28(28):10478-87. doi: 10.1021/la302118h. Epub 2012 Jun 29.
The adsorption of ammonia on Zr(OH)(4), as well as Zr(OH)(4) treated with sulfuric acid, were examined. The results show that treating Zr(OH)(4) with sulfuric acid leads to the formation of a sulfate on the surface of the material, and that the sulfate contributes to the ammonia adsorption capacity through the formation of an ammonium sulfates species. Calcination of Zr(OH)(4) decreases the ammonia adsorption capacity of the material and limits the formation of sulfate species. NMR and FTIR spectroscopy results are presented that show the presence of two distinct ammonium species on the surface of the material. The adsorption capacity of the materials is shown to be a complex phenomenon that is impacted by the surface area, the sulfur content, and the pH of the material. The results illustrate that Zr(OH)(4), which is known to adsorb acidic gases, can be modified and used to adsorb basic gases.
研究了氨在 Zr(OH)(4)以及硫酸处理过的 Zr(OH)(4)上的吸附行为。结果表明，硫酸处理 Zr(OH)(4)会导致材料表面形成硫酸盐，硫酸盐通过形成硫酸铵物种来促进氨的吸附能力。Zr(OH)(4)的煅烧会降低材料的氨吸附能力，并限制硫酸盐物种的形成。本文还介绍了 NMR 和 FTIR 光谱结果，表明材料表面存在两种不同的铵物种。研究表明，材料的吸附能力是一个复杂的现象，受到表面积、硫含量和材料 pH 值的影响。结果表明，已知吸附酸性气体的 Zr(OH)(4)可以进行改性并用于吸附碱性气体。
